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maquinas de corriente alterna.pdf - Universidad Tecnológica de ...

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226 Capítulo 3. La máquina <strong>de</strong> inducción<br />

V 1 = 26∠0 ◦ , V 2 = 26∠ − 90 ◦ ,<br />

V fs = V 1 + jV 2<br />

√<br />

2<br />

= 26∠0◦ + j26∠ − 90 ◦<br />

√<br />

2<br />

= 36,77∠0 ◦ ,<br />

V bs = V 1 − jV 2<br />

√<br />

2<br />

= 26∠0◦ − j26∠ − 90 ◦<br />

√<br />

2<br />

= 0.<br />

I bs = I ′ br = 0.<br />

De la figura 3.39<br />

65 j75 j65<br />

+<br />

I fs<br />

36.77∠0 ◦ 165<br />

−<br />

Figura 3.39: Circuito <strong>de</strong>l ejemplo 3.1<br />

36,77∠0 ◦ = (65 + j75 + j65 + 165)I fs = (230 + j140)I fs ,<br />

I fs = 0,1366∠ − 31,33 ◦ ,<br />

I ′ fr = −I fs = 0,1366∠148,67 ◦ ,<br />

I bs = I ′ br = 0.<br />

Así:<br />

Si:<br />

P = V fs I fs ,<br />

P = (36,77)(0,1366)cos(31,33 ◦ ) = 4,29 W.<br />

[<br />

I1<br />

]<br />

= 1 [ 1 1<br />

√<br />

I 2 2 −j j<br />

][<br />

Ifs<br />

I bs<br />

]<br />

I 1 = 0,0966∠ − 31,33 ◦ ,<br />

I 2 = 0,0966∠ − 121,33 ◦ .<br />

P = 2V 1 I 1 cosθ = 2(26)(0,0966)cos(31, 33 ◦ ) = 4,29 W.

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